Apple has released Aperture 3.0.1 via their Software Update utility and website. According to the company, this update improves overall stability and addresses a number of issues in Aperture 3, including:

Slickrick, thanks for the advice, I gave it a shot, but no joy. Searched on Apple Support, sadly it has seems to be something to do with how Apple names the program and if you have Aperture 2; although the method you mentioned worked for some as well.

In my case Aperture 3 can not be named as Apple installs it as Aperture 3 to upgrade, if you are upgrading from Aperture 2. When you upgrade to 3 no changes are made to the Aperture 2.app and it seems the update is looking alphabetically for Aperture 3...so it finds 2 first and then craps out. Rename Aperture 3 to Aperture or delete the Aperture 2.app is the solution. Odd._________________2.3 GHz i7 Mini (stock)
2.6 GHz i7 Mini, Samsung 830 & Hitachi
15" 2.3 GHz i7 MBP, Samsung 840 & WD Black
3.5GHz 6C MP, D700s

Does anyone know if it is possible to run this on a headless Mac Mini (no monitor connected)? I was hoping to use this to manage a central picture store, but do the edits on my Macbook, syncing back the changes to the Mini?

When I try to run the program I get a message that the installed graphic card does not support the minimum requirements or something like that.

The Mini is a 2009 model with Nvidia graphics. I can start iPhoto OK on that headless Mini...

I know raw files are more complex and not compressed. I'm really hoping that it is an issue with Aperture (and could be fixed in the future) rather than being caused by my choice of picture format.

Sorry, I didn't realize you were specifically talking about RAW images. I have like 30% from a Nikon D60, with the rest being standard JPEG files. I'm looking at an album now of about 40 pictures (.NEF) at fullscreen. I'm floating at around 1.1GB. Coming out of fullscreen into the browser drops it down to like 850MB._________________14" 1.25GHz G4 iBook (died)
1.42GHz Mac mini (almost dead)
1.66GHz Core Duo Mac mini (sold)
2.0GHz Core 2 Duo Mac mini '09 (sold)
2.3GHz quad-core Intel Core i7 Mac mini

I know raw files are more complex and not compressed. I'm really hoping that it is an issue with Aperture (and could be fixed in the future) rather than being caused by my choice of picture format.

Sorry, I didn't realize you were specifically talking about RAW images. I have like 30% from a Nikon D60, with the rest being standard JPEG files. I'm looking at an album now of about 40 pictures (.NEF) at fullscreen. I'm floating at around 1.1GB. Coming out of fullscreen into the browser drops it down to like 850MB.

Sorry. I didn't mention it earlier. I guess it is just because of the complexity of the NEF files. Oh well.